Baldwin Filters
Baldwin Filters PT257 Hydraulic Filter Element 3-1/2" L
Cartridge-style hydraulic filter element with reinforced centertube and included O-ring for Caterpillar excavators and Army-Navy systems
- TypeAutomotive Filters
- Reliable hydraulic filtration with cartridge design
- Reinforced centertube resists collapse under pressure
- O-ring included for leak-free sealing
- Fits Caterpillar excavators and Army-Navy systems
- Compact 3-1/2 inch length suits tight installations
Hydraulic Filter Element for Caterpillar Excavators
This Baldwin Filters PT257 cartridge element fits Caterpillar excavators and Army-Navy hydraulic systems. It measures 3-1/2 inches in length with a 1 21/32 inch outside diameter and includes an O-ring for sealing.
Sustained filtration with reinforced centretube
The reinforced centretube resists collapse during continuous hydraulic flow, maintaining consistent filtration over extended operating periods. Cartridge construction allows straightforward replacement when the service interval arrives.
Verify thread size and system compatibility
Thread size is not applicable for this element, so confirm the housing uses a cartridge-style mount before ordering. Check that the 7/8 inch inside diameter matches your existing filter head specifications.
Highlights
- Reliable hydraulic filtration with cartridge design
- Reinforced centertube resists collapse under pressure
- O-ring included for leak-free sealing
- Fits Caterpillar excavators and Army-Navy systems
- Compact 3-1/2 inch length suits tight installations
Specifications
| Brand | BALDWIN FILTERS |
|---|---|
| Type | Automotive Filters |
Questions about this item
Does the PT257 cartridge generate noticeable heat or noise when the hydraulic system runs continuously?
The PT257 is a passive filter element with no moving parts, so it produces no noise and adds negligible heat to the hydraulic circuit.
What existing fittings or housing must I already have to install the PT257 element?
You need a compatible filter housing that accepts a 3-1/2 in long cartridge with a 1 21/32 in outside diameter and a 7/8 in inside diameter, plus the supplied O-ring for sealing.
Will the PT257 fit older Caterpillar excavators that originally used Army-Navy hydraulic specifications?
Yes, the element is listed for use with Caterpillar excavators and Army-Navy hydraulic systems, so it matches those legacy applications.
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